“Fibromyalgia is one of the most common chronic pain disorders,” said medical website EverydayHealth.

“Although fibromyalgia can occur in anyone, it’s more common in women.

“Between 75 and 90 per cent of people diagnosed with the disorder are women.

“Having certain other medical conditions may be another risk factor for fibromyalgia.

“In many cases, it isn’t clear whether these conditions might trigger the onset of fibromyalgia, or whether they are instead an effect of fibromyalgia — or whether both conditions are due to some other underlying cause.”